彻底移除所有子模块，转为普通文件夹

.gitmodules

@@ -1,21 +0,0 @@
-[submodule "panda"]
-  path = panda
-  url = https://github.com/sunnyhaibin/panda.git
-[submodule "opendbc"]
-  path = opendbc_repo
-  url = https://github.com/sunnypilot/opendbc.git
-[submodule "msgq"]
-  path = msgq_repo
-  url = https://github.com/commaai/msgq.git
-[submodule "rednose_repo"]
-  path = rednose_repo
-  url = https://github.com/commaai/rednose.git
-[submodule "teleoprtc_repo"]
-  path = teleoprtc_repo
-  url = https://github.com/commaai/teleoprtc
-[submodule "tinygrad"]
-  path = tinygrad_repo
-  url = https://github.com/sunnypilot/tinygrad.git
-[submodule "sunnypilot/neural_network_data"]
-  path = sunnypilot/neural_network_data
-  url = https://github.com/sunnypilot/neural-network-data.git